CN106268131A - The dust pelletizing system of waste product exhausting line - Google Patents
The dust pelletizing system of waste product exhausting line Download PDFInfo
- Publication number
- CN106268131A CN106268131A CN201610728047.9A CN201610728047A CN106268131A CN 106268131 A CN106268131 A CN 106268131A CN 201610728047 A CN201610728047 A CN 201610728047A CN 106268131 A CN106268131 A CN 106268131A
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- China
- Prior art keywords
- cavity
- air
- filtration members
- waste product
- exhausting line
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Cyclones (AREA)
Abstract
The invention discloses the dust pelletizing system of waste product exhausting line, including cyclone dust extractor, pulse dust collector and blower fan.Cyclone dust extractor includes air inlet and air outlet, and this air inlet enters for the air discharged for machine；Pulse dust collector includes housing, feeder and several filtration members；Enclosure interior has filter chamber, and filter chamber includes the first mutually isolated cavity and the second cavity, and several filtration members are located in the first cavity；Each filtration members is respectively provided with an inner space, and this inner space connects with the filtering holes of filtration members, and this inner space connects with the second cavity；First cavity connects with the air outlet of cyclone dust extractor；Feeder is used for providing pulsed gas flow, feeder to include, and several escape pipes, each escape pipe stretch in the inner space of a filtration members；The air inlet of this blower fan and the connection of the second cavity.The present invention can carry out dedusting to the air that exhausting line is discharged, and improves air quality.
Description
Technical field
The present invention relates to the dust pelletizing system of waste product exhausting line.
Background technology
Operationally, material first passes through tape transport and carries out coarse crushing to cyclopentane gas detector, tightly waste product exhausting line
Then pass through tape transport and carry out in small, broken bits to standing crusher, then waste product is carried out multiple sorting.In work process
The machine of middle waste product exhausting line can produce a lot of dust, affects ambient air quality.
Summary of the invention
In order to overcome the deficiencies in the prior art, it is an object of the invention to provide the dedusting system of a kind of waste product exhausting line
System, can carry out dedusting to the air that exhausting line is discharged, improve air quality.
The purpose of the present invention realizes by the following technical solutions:
The dust pelletizing system of waste product exhausting line, including:
Cyclone dust extractor, including air inlet and air outlet, this air inlet enters for the air discharged for machine；
Pulse dust collector, including housing, feeder and several filtration members；Enclosure interior has filter chamber, filter chamber
Including the first mutually isolated cavity and the second cavity, several filtration members are located in the first cavity；Each filtration members is respectively provided with
One inner space, this inner space connects with the filtering holes of filtration members, and this inner space connects with the second cavity；First chamber
Body connects with the air outlet of cyclone dust extractor；Feeder be used for providing pulsed gas flow, feeder include several for
Spraying the escape pipe of described pulsed gas flow, several escape pipes and filtration members one_to_one corresponding, each escape pipe stretches to one
In the inner space of filtration members；
Blower fan, the air inlet of this blower fan and the connection of the second cavity.
Preferably, the bottom of cyclone dust extractor is provided with the first ash hole, is provided with star-shaped discharge valve at the first ash hole.
Preferably, cyclone dust extractor also includes the first collection ash bucket, the first collection ash bucket be positioned at below the first ash hole and for
Collect the dust that the first ash hole drops through star-shaped discharge valve.
Preferably, the bottom of the second cavity has the second ash hole, and filter collector is additionally provided with the second collection ash bucket, the second collection
Ash bucket is positioned at below the second ash hole and for collecting the dust that the second ash hole drops.
Preferably, cyclone dust extractor has an inner chamber, and this air outlet is communicated in the side of inner chamber, in this air inlet is communicated in
The top in chamber.
Preferably, feeder includes source of the gas and impulse electromagnetic valve, source of the gas by after impulse electromagnetic valve the most respectively with some
Individual escape pipe connects.
Preferably, escape pipe is positioned at the part of filtration members inner space and is provided with at least one venthole.
Preferably, this filtration members is dust settling pocket.
Preferably, also including discharge component, the inside of discharge component has a material chamber, in the opposite sides of discharge component also
It is respectively equipped with feeding mouth and air intake vent, feeding mouth and air intake vent to be respectively communicated with in the opposite sides in material chamber, the bottom of discharge component
It is additionally provided with the blanking port that the bottom with this material chamber connects；Feeding mouth is for connecting the discharging opening of machine, and air intake vent is for for outside
Air-flow enters, and the air inlet of this cyclone dust extractor is communicated in the top in material chamber.
Preferably, the air outlet of cyclone dust extractor and the top connection of the first cavity, the second cavity is positioned at the first cavity
Side, the air inlet of blower fan and the bottom connection of the second cavity.
Compared to existing technology, the beneficial effects of the present invention is: the dust pelletizing system bag of the waste product exhausting line of the present invention
Including cyclone dust extractor and pulse dust collector, the air that the machine of exhausting line is discharged enters whirlwind by the air inlet of cyclone dust extractor
In cleaner unit, being collected by big dust granule in cyclone dust extractor, then air is discharged from the air outlet of cyclone dust extractor, is entered
Entering the first cavity of pulse dust collector, tiny dust adsorption is on the sidewall of filtration members, and clean air is through filtration members
Filtering holes enters the second cavity, and is inhaled into from the air inlet of blower fan, and so, clean air is discharged from the air outlet of blower fan,
Further, feeder is used for providing pulsed gas flow, is ejected into the inner space of several filtration members by several escape pipes
In, the dust adsorbed on filtration members sidewall spray the most just can be walked and fall with clearance-type jet by air pulse
The bottom of filter chamber, it is to avoid the dust in filtration members too much affects filter effect.
Accompanying drawing explanation
Fig. 1 is the structural representation (eliminating discharge component and the first collection ash bucket) of dust pelletizing system of the present invention；
Fig. 2 is the structural representation of discharge component of the present invention；
Fig. 3 is the operation principle schematic diagram of dust pelletizing system of the present invention；
In figure: 10, cyclone dust extractor；11, inner chamber；12, the air inlet of cyclone dust extractor；13, the first ash hole；14, star
Type discharge valve；15, the first collection ash bucket；16, the air outlet of cyclone dust extractor；17, breather；20, pulse dust collector；21, filter
Chamber；211, the first cavity；212, the second cavity；22, filtration members；23, the second ash hole；24, feeder；241, escape pipe；
25, the second collection ash bucket；30, blower fan；31, the air outlet of blower fan；40, discharge component；41, material chamber；42, feeding mouth；43, inlet air
Mouthful；44, blanking port.
Detailed description of the invention
Below, in conjunction with accompanying drawing and detailed description of the invention, the present invention is described further:
As shown in Figures 1 to 3, the dust pelletizing system of the waste product exhausting line of the present invention, remove including cyclone dust extractor 10, pulse
Dirt device 20 and blower fan 30.Cyclone dust extractor 10 includes air inlet and air outlet, and this air inlet enters for the air discharged for machine
Enter；Pulse dust collector 20 includes housing, feeder 24 and several filtration members 22；Enclosure interior has filter chamber 21, filters
Chamber 21 includes the first mutually isolated cavity 211 and the second cavity 212, and several filtration members 22 are located in the first cavity 211；Often
Individual filtration members 22 is respectively provided with an inner space, and this inner space connects with the filtering holes of filtration members 22, and this inner space with
Second cavity 212 connects；First cavity 211 connects with the air outlet 16 of cyclone dust extractor 10；Feeder 24 is used for providing arteries and veins
Rushing formula air-flow, feeder 24 includes that several are for the escape pipe 241 spraying described pulsed gas flow, several escape pipes
241 with filtration members 22 one_to_one corresponding, each escape pipe 241 stretches in the inner space of a filtration members 22；This blower fan 30
Air inlet and the second cavity 212 connect.
The dust pelletizing system of the waste product exhausting line of the present invention includes cyclone dust extractor 10 and pulse dust collector 20, exhausting line
The air discharged of machine enter in cyclone dust extractor 10 by the air inlet 12 of cyclone dust extractor, by big dust granule in rotation
Collecting in wind cleaner unit 10, then the first chamber of pulse dust collector 20 is discharged, entered to air from the air outlet 16 of cyclone dust extractor
Body 211, tiny dust adsorption is on the sidewall of filtration members 22, and clean air enters second through the filtering holes of filtration members 22
Cavity 212, and be inhaled into from the air inlet of blower fan 30, so, clean air is discharged from the air outlet 31 of blower fan, and, supply
Device of air 24 is used for providing pulsed gas flow, is ejected into the inner space of several filtration members 22 by several escape pipes 241
In, the dust adsorbed on filtration members 22 sidewall spray the most just can be walked and fall with clearance-type jet by air pulse
Bottom to filter chamber 21, it is to avoid the dust in filtration members 22 too much affects filter effect.
Present invention could apply to the exhausting line of multiple waste product, it is preferable that present invention is particularly suitable for application in waste and old
Metal recovery line.
The present invention in use, makes the air that the machine needing waste product exhausting line is discharged from the air intake of cyclone dust extractor
Mouth 12 enters, and discharges from discharging opening owing to the air of the machine of waste product exhausting line is more, it is preferable that in use, make back
The air that the discharging opening of the machine of take-up is discharged enters from the air inlet 12 of cyclone dust extractor.
Preferably, the bottom of cyclone dust extractor 10 is provided with the first ash hole 13, is provided with star-like unloading at the first ash hole 13
Material valve 14, the blade on the impeller of star-shaped discharge valve 14 all the time with the sidewall contact of the first ash hole 13 both sides, it is ensured that outer
The air in portion cannot connect with the inner chamber 11 of cyclone dust extractor 10, when needs ash discharge, by wheel rotor, and again can be by whirlwind
The dust of cleaner unit 10 inner chamber 11 is discharged.More preferably, cyclone dust extractor 10 also includes the first collection ash bucket 15, the first collection ash bucket 15
It is positioned at below the first ash hole 13 and for collecting the dust that the first ash hole 13 drops through star-shaped discharge valve 14, so, just
Cleaning in dust.
Preferably, the bottom of the second cavity 212 has the second ash hole 23, and filter collector is additionally provided with the second collection ash bucket
25, the second collection ash bucket 25 is positioned at below the second ash hole 23 and for collecting the dust that the second ash hole 23 drops, so, it is simple to
The cleaning of dust.
Preferably, cyclone dust extractor 10 has an inner chamber 11, and this air outlet is communicated in the side of inner chamber 11, and this air inlet is even
Leading in the top of inner chamber 11, so, after air enters, big dust granule falls to bottom inner chamber 11, with fine dust
Gas is discharged from inner chamber 11 top；Preferably, the bottom of cyclone dust extractor 10 inner chamber 11 is cone.
More preferably, the quantity of cyclone dust extractor 10 has two, and two cyclone dust extractors 10 share an air inlet.
Preferably, feeder 24 includes source of the gas and impulse electromagnetic valve, if source of the gas by after impulse electromagnetic valve the most respectively with
A dry escape pipe 241 connects, and is connected with several escape pipes 241 by source of the gas to impulse electromagnetic valve intermittence, can make escape pipe
241 intermittence ground jets；Preferably, this source of the gas is high-pressure air source.More preferably, each escape pipe 241 is positioned at filtration members 22
The part in space, portion is provided with at least one venthole.
Preferably, this filtration members 22 is dust settling pocket；Certainly, filtration members 22 can also be filter element, cartridge filter etc..
Material typically can be got rid of by the machine (such as standing crusher, friction cleaning machine etc.) of waste product exhausting line when discharging
Go out, so typically can produce at discharging opening and bigger throw away air-flow, accordingly, it would be desirable to utilize another air-flow with throw away air-flow to blow with
Airflow balancing.Preferably, dust pelletizing system also includes that discharge component 40, the inside of discharge component 40 have a material chamber 41, discharging group
Further respectively have feeding mouth 42 and air intake vent 43, feeding mouth 42 and air intake vent 43 in the opposite sides of part 40 to be respectively communicated with in material chamber
The opposite sides of 41, the bottom of discharge component 40 is additionally provided with the blanking port 44 that the bottom with this material chamber 41 connects；Feeding mouth 42 is used
In the discharging opening of connection machine, air intake vent 43 is for entering for outer gas stream, and the air inlet 12 of this cyclone dust extractor is communicated in material
The top in chamber 41.So, air intake vent 43 is blown into for outer gas stream, and makes air-flow put down with the air-flow that throws away of machine discharging opening to blowing
Weighing apparatus, such material can fall by the discharging opening bottom material chamber 41, and machine expellant gas can be discharged also from the top in material chamber 41
Arrive the air inlet 12 of cyclone dust extractor.More preferably, the air inlet 12 of cyclone dust extractor is by a breather 17 and material chamber 41
Top connection.
Preferably, the air outlet 16 of cyclone dust extractor connects with the top of the first cavity 211, and the second cavity 212 is positioned at
The side of one cavity 211, the air inlet of blower fan 30 and the bottom connection of the second cavity 212.More preferably, filtration members 22 has many
Individual, the short transverse along the first cavity 211 is spaced, and such filter effect is more preferable.
It will be apparent to those skilled in the art that can technical scheme as described above and design, make other various
Corresponding change and deformation, and all these change and deformation all should belong to the protection domain of the claims in the present invention
Within.
Claims (10)
1. the dust pelletizing system of waste product exhausting line, it is characterised in that including:
Cyclone dust extractor, including air inlet and air outlet, this air inlet enters for the air discharged for machine；
Pulse dust collector, including housing, feeder and several filtration members；Enclosure interior has filter chamber, and filter chamber includes
The first mutually isolated cavity and the second cavity, several filtration members are located in the first cavity；In each filtration members is respectively provided with one
Space, portion, this inner space connects with the filtering holes of filtration members, and this inner space connects with the second cavity；First cavity with
The air outlet connection of cyclone dust extractor；Feeder is used for providing pulsed gas flow, feeder to include, and several are for spraying
The escape pipe of described pulsed gas flow, several escape pipes and filtration members one_to_one corresponding, each escape pipe stretches to a filtration
In the inner space of part；
Blower fan, the air inlet of this blower fan and the connection of the second cavity.
2. the dust pelletizing system of waste product exhausting line as claimed in claim 1, it is characterised in that the bottom of cyclone dust extractor sets
There is the first ash hole, at the first ash hole, star-shaped discharge valve is installed.
3. the dust pelletizing system of waste product exhausting line as claimed in claim 2, it is characterised in that cyclone dust extractor also includes the
One collection ash bucket, the first collection ash bucket is positioned at below the first ash hole and for collecting what the first ash hole dropped through star-shaped discharge valve
Dust.
4. the dust pelletizing system of waste product exhausting line as claimed in claim 1, it is characterised in that the bottom of the second cavity has
Second ash hole, filter collector is additionally provided with the second collection ash bucket, and the second collection ash bucket is positioned at below the second ash hole and for collecting
The dust that second ash hole drops.
5. the dust pelletizing system of waste product exhausting line as claimed in claim 1, it is characterised in that in cyclone dust extractor has
Chamber, this air outlet is communicated in the side of inner chamber, and this air inlet is communicated in the top of inner chamber.
6. the dust pelletizing system of waste product exhausting line as claimed in claim 1, it is characterised in that feeder include source of the gas and
Impulse electromagnetic valve, source of the gas is by connecting with several escape pipes the most respectively after impulse electromagnetic valve.
7. the dust pelletizing system of waste product exhausting line as claimed in claim 1, it is characterised in that escape pipe is positioned at filtration members
The part in space, portion is provided with at least one venthole.
8. the dust pelletizing system of waste product exhausting line as claimed in claim 1, it is characterised in that this filtration members is dust settling pocket.
9. the dust pelletizing system of waste product exhausting line as claimed in claim 1, it is characterised in that also include discharge component, go out
The inside of material assembly has a material chamber, and the opposite sides of discharge component further respectively has feeding mouth and air intake vent, feeding mouth and
Air intake vent is respectively communicated with in the opposite sides in material chamber, and the bottom of discharge component is additionally provided with the blanking that the bottom with this material chamber connects
Mouthful；Feeding mouth is for connecting the discharging opening of machine, and air intake vent is for entering for outer gas stream, and the air inlet of this cyclone dust extractor is even
Lead in the top in material chamber.
10. the dust pelletizing system of waste product exhausting line as claimed in claim 1, it is characterised in that the air-out of cyclone dust extractor
Mouth connects with the top of the first cavity, and the second cavity is positioned at the side of the first cavity, the air inlet of blower fan and the end of the second cavity
Portion connects.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610728047.9A CN106268131A (en) | 2016-08-25 | 2016-08-25 | The dust pelletizing system of waste product exhausting line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610728047.9A CN106268131A (en) | 2016-08-25 | 2016-08-25 | The dust pelletizing system of waste product exhausting line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106268131A true CN106268131A (en) | 2017-01-04 |
Family
ID=57676509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610728047.9A Pending CN106268131A (en) | 2016-08-25 | 2016-08-25 | The dust pelletizing system of waste product exhausting line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106268131A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108246033A (en) * | 2018-03-09 | 2018-07-06 | 西南科技大学 | A kind of small dry dust-extraction unit |
| CN111322856A (en) * | 2020-04-07 | 2020-06-23 | 普定县栋泰辉建材有限公司 | Dihydrate gypsum drying device |
| CN114405810A (en) * | 2021-12-29 | 2022-04-29 | 环创(厦门）科技股份有限公司 | Construction waste screening equipment |
| CN114749378A (en) * | 2022-03-18 | 2022-07-15 | 广东潮艺金属实业有限公司 | Airflow grading system with raise dust recycling function |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2393629Y (en) * | 1999-10-18 | 2000-08-30 | 国家电力公司热工研究院 | Filtering dust collector with movable particular layers |
| KR100375566B1 (en) * | 2001-11-27 | 2003-03-12 | (주)씨에프텍 | Semi Dry reacting CYclone BAGfilter(SD-CYBAG) System for eliminating pollutant gas and dust including Mercury and heavy metal |
| CN1689686A (en) * | 2004-03-26 | 2005-11-02 | 北京博鹏北科科技有限公司 | Plug-in type blowback dust cleaning device used in bag-type dust collector and method thereof |
| CN201002029Y (en) * | 2006-12-28 | 2008-01-09 | 张世平 | Pulverizing system for producing mullite |
| CN201551924U (en) * | 2009-11-12 | 2010-08-18 | 无锡恒富科技有限公司 | Pulse back blowing device of dust collector |
| CN202146752U (en) * | 2011-06-17 | 2012-02-22 | 四会市达博文实业有限公司 | Discharging dust-collecting device for hydrogen storage alloy powder mixer |
| CN204380474U (en) * | 2015-01-13 | 2015-06-10 | 湖北瓦仓谷香生态农业有限公司 | Automation dust arrester |
| CN204485518U (en) * | 2015-03-07 | 2015-07-22 | 陈健康 | Pulsed jet cloth filter |
-
2016
- 2016-08-25 CN CN201610728047.9A patent/CN106268131A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2393629Y (en) * | 1999-10-18 | 2000-08-30 | 国家电力公司热工研究院 | Filtering dust collector with movable particular layers |
| KR100375566B1 (en) * | 2001-11-27 | 2003-03-12 | (주)씨에프텍 | Semi Dry reacting CYclone BAGfilter(SD-CYBAG) System for eliminating pollutant gas and dust including Mercury and heavy metal |
| CN1689686A (en) * | 2004-03-26 | 2005-11-02 | 北京博鹏北科科技有限公司 | Plug-in type blowback dust cleaning device used in bag-type dust collector and method thereof |
| CN201002029Y (en) * | 2006-12-28 | 2008-01-09 | 张世平 | Pulverizing system for producing mullite |
| CN201551924U (en) * | 2009-11-12 | 2010-08-18 | 无锡恒富科技有限公司 | Pulse back blowing device of dust collector |
| CN202146752U (en) * | 2011-06-17 | 2012-02-22 | 四会市达博文实业有限公司 | Discharging dust-collecting device for hydrogen storage alloy powder mixer |
| CN204380474U (en) * | 2015-01-13 | 2015-06-10 | 湖北瓦仓谷香生态农业有限公司 | Automation dust arrester |
| CN204485518U (en) * | 2015-03-07 | 2015-07-22 | 陈健康 | Pulsed jet cloth filter |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108246033A (en) * | 2018-03-09 | 2018-07-06 | 西南科技大学 | A kind of small dry dust-extraction unit |
| CN111322856A (en) * | 2020-04-07 | 2020-06-23 | 普定县栋泰辉建材有限公司 | Dihydrate gypsum drying device |
| CN111322856B (en) * | 2020-04-07 | 2023-09-26 | 普定县栋泰辉建材有限公司 | Dihydrate gypsum drying device |
| CN114405810A (en) * | 2021-12-29 | 2022-04-29 | 环创(厦门）科技股份有限公司 | Construction waste screening equipment |
| CN114749378A (en) * | 2022-03-18 | 2022-07-15 | 广东潮艺金属实业有限公司 | Airflow grading system with raise dust recycling function |
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Application publication date: 20170104 |
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